Automatic lubricator.



R. WOOD.

AUTOMATIC LUBRICATOR.

APPLICATION FILED JULY 5, 1912.

1,082,002, Patented Dec. 23, 1913.

"UNITED STATES; PATENT @FhlCE.

ROBERT WOOD, 0F WESIMQUNT, QUEBEC, CANADA, ASSIGNOR T0 NATHAN MANUFAC- TUBING 00:, or NEW YORK, N. Y.,

A CORPORATION OF NEW YORK.

AUTOMATIC LUBRICATOR.

Specification of Letters Patent.

Patented Dec. as, 1913.

Application filed July 5, mm. Serial No. 707,865..

1" b all whom it"may concern:

Be it known that 1, ROBERT Wool), of Nestmount, Province of Quebec, Canada, have invented certain new and useful Improvements in Automatic Lubricators; and I hereby declare that the following is a full, clear, and exact description of the same.

The invention relates particularly to! drop sight feed lubricators which are adapted to be connected to a source of alternating pressure. I

One of the objects of my invention is to improve the general construction of lubricators of this type and to provide a force drop sight feed or in other words means for dropping the oil under compression instead of relying solely on gravity.

Another object is to provide a duplex teed during one action of the operating mechanism of thelubricator.

The several advantages of my invention will be hereinafter described and pointed out in the claims. For full comprehension, however, of my invention reference must be had to theaocompanying drawings forming a part of'this specification, in which like reference characters indicate the same parts and wherein:

Figure 1 is a vertical section of a lubricator constructed. according to my invention and illustrating the piston during its forward stroke; and Fig. 2 is a similar view with the piston on its return stroke.

This lubrieator may be applied in multiple to any engine and be operated by the motive power thereof but for the sake of clearncss I willnow describe a single application of the lubricator to a steam engine.

Referring now to the drawings, 6 represents the oil reservoir having the screened inlet 0 and air vent d. A casting a is secured to one side of the lubricator and forms a top chamber and a bottom chamber communicating with each other through a sightglass 7' while an oil passage 9 extends from near the bottom of the reservoir to the top chamber. A piston cylinder h is carried by the reservoir and extends from one side of the latter, where it is connected to a steam supply pipe 2', to the otherside through the casting e, where it is connected to the oilsupply pipe leading to the point to be lubricated. The cylinder h is in communication with the assage g and is continued through the casting e and beneath the bottom chamber, with which it is connected by a passage k.

The piston Z comprises an enlarged steam impact end m and a reduced oil ramming endn the latter bein connected to the main length of the piston y a neck 0. The cylinder /L is bored to closely lit the different sized ends of the piston and thus presents three chambers 79, and 1- which will'be further alluded to. g coiled returning spring 8 bears between the enlarged end m and the shoulder formed between the chambers p and'g. The neck 0 forms an open space in the chamber 9 and as the passage 9 passes through this chamber at just about this point, asuction will be created therein when the piston moves on its return stroke, see arrow, Fig. 2.

In the operation of the lubricator oil may work its way along the chamber g into the chamber and to prevent the accumulation of such Oll in the latter where it may interfere with the action of the piston, I have provided a relief-vent or vents 10 through such chamber into the reservoir b so that the oil in such chamber is free to escape under the pressure of the piston while by means of these holes the spring 8 is always thoroughly lubricated. Holes 12 are also provided in the portion of the chamber outsidethe lubricator to carry ofi the condensed steam, etc.

Prior to its operation the lubricator is primed and therefore as the piston is forced forward (see arrow, Fig. 1) by the steam from the pipe 2', a quantity of oil will be forced from the chamber 1' past the back pressure valve t into the pipe j and so to the point it is desired to lubricate. Simultaneously with the forcing of the oil into the pipe j a quantity of oil will be pumped from the chamber g up through the passage 9 into the top chamber and so cause a quantity to drop through the nozzle u. A spindle valve 11 regulates the passage through the nozzle, the extent of which is preferably maintained at less than will accommodate the quantity pumped into the top chamber. The flow of oil through the passage in is controlled by a ball valve w adapted to be seated upon a perforated valve seat :u and also, when forced up by the compressive force exerted by the piston, to close the vent y in the hood 2. When the piston approaches the end of its forward stroke,

(see dotted line Fig. 1) the portion a closes the passage is and relieves the latter of pres sure, the ball valve to therefore falling and permitting the oil, which accumulates in the bottom of the glass f, to run past the vent y and through the perforations in the valve seat on. 1

As the piston moves forward several functions are performed thereby, viz.; A quantity of oilis forced through pipe 9' and, simultaneously a quantity of oil is pumped into the top chamber and the ball valve to operated to close the vent y and check the flow of oilfrom the sight glass and then the ball valve is caused to open the vent y and allow the oil to flow therethrough. I

When the steam is momentarily shut ofi' by the cut-0d valve of the engine, the piston is returned, through the influence of the spring 8 and a suction is created within the chamber g and at the outlet of the reservoir, a quantity of oil being drawn therefrom through the lower end of the passage g into the said chamber 9 in readiness to be pumped up through the passage 9 to the top chamber. A combined back pressure valve and screening plug 2 is located in the lower end of the passage g. Theoil is in this way relayed from thereservoir to the chamber 9 and so to the top chamber.

As above described, a greater quantity of oil is pumped into the top chamber than is expelled therefrom through the nozzle 14 and such excess oil under pressure may be carried off and utilized to lubricate a point distinct from that reached by, the pi e j.

F or this purpose I have provided an auxi iary outlet 3 from the top chamber and have connected a pipe 4 thereto, having a back pressure valve 5. A valve 6 is placed in the outlet so that the latter may be shutofi; When the piston moves forward and oil is pumped. into the top valve chamber, a portion of such oil will be forced through the auxiliary pipe 4 as well as through the nozzle but it is to be understood that if so desired the passage 3 may be closed by the valve 6 and the operation of the lubricator continued as usual, in which case when the pressure in the top chamber and the steam pressure in the pipe '21 are in equilibrium the piston remains at rest until the pressure in the top chamber becomes depleted by the discharge through the nozzle it.

In the event of the supply pipe j becoming inoperative the discharge therethrough may be discontinued by completely closing the nozzle u by the spindle valve 1) and the full discharge of oil directed through pipe 4.

What I claim is as follows:

1. In a drop sight feed lubricator, the combination with an oil reservoir and a supply pipe, of a top chamber, a bottom chamber in communication with the top noeacoe chamber, an oil passage leading from the between the bottom chamber and the piston cylinder and including a perforated valve-seat, a hood forthe valve seat and having a vent therein and a valve seated upon the valve seat and adapted to close the said vent, and a piston within the said cylinder. I

2. Ina drop sight feed lubricator, the combination with an oil reservoir and'a supply pipe, of a top chamber, a bottom chamber in communication. with the top chamber, an oil passage leading from the reservoir to the top chamber, a piston cylinder in communication with the supplypipe, oil passage and bottom chamber,- a piston in the said cylinder, an auxiliary supply pipe leading from the top chamber to a point distinct from the reservoir, a backpres'sure valve in the said auxiliary pipe and a valve adapted to completely shut off the said auxiliary pipe from the top chamber.

3. In a drop sight feed lubricator, the combination with an oil reservoir and a supply pipe, of a top chamber, a nozzle within the top chamber, a bottom chamber, a perforated valve seat within the bottom chamber, a hood for the valve seat and having a vent therein, a valve seated upon the valve seat and adapted to close the said vent, a sight glass connectin the two chambers, a piston cylinder having its interior diameter reduced at one end and being in communication with the supply pipe, a pas sage from the bottom chamber to the reduced end of the cylinder, an oil passage leading from the oil reservoir at a point below the cylinder and through the latter to the top chamber, and a piston correspending to and located within the said cylinder. i

4. In a drop sight feed lubricator, the combination with anoil reservoir and a supply pipe, of a top chamber, a nozzle within the top chamber, an outlet pipe leading from the top chamber, a back pressure valve within the out-let pipe, a valve controlling the passage through such outlet pipe, a bottom chamber, aperforated valve seat within the bottom chamber, a hood for the valve seat and having a vent therein, a ball valve seated upon the valve seat and adapted to close the said vent, a sight glass connecting the two chambers, a piston cylinder having its interior diameter reduced at one end and being in communication with the supply pipe, a steam supply pipe connected to the opposite end of the cylinder,

a passage from the bottom chamber to the reduced end of the cylinder, an oil passage leading from the Oll reservoir at a point iilltl) lllti below the cylinder, through the latter to the top chamber, a piston corresponding to and located within the casing and presenting a neck adjacent to the reduced end, such piston being moved forward to cause a compression in the supply pipe and in the oil passage and a spring adapted to return the piston to create a suction at the reservoir outlet.

5. In a drop sight feed lubricator, the combination with an oil reservoir, a supply pipe and a back pressure valve Within the supply pipeof a top chamber, a nozzle Within the top chamber, a spindle valve for regulating the capacity of the nozzle, a bottom chamber, a perforated valve seat within the bottom chamber, a hood for the valve seat and having a vent therein, a ball valve upon the perforated valve seat and adapted to close the said vent, a sight glass connecting the top and bottom chambers, a piston cylinder extending beneath the bottom chamber, the interior of such cylinder being reduced and in communication with the supply pipe, a steam pipe connected to the end of the cylinder, a relief vent in the cylinder, a passage between the reduced end of the cylinder and the bottom chamber, an oil passage leading from the oil reservoir to the cylinder at a point below the latter and extending upward from the cylinder to the top chamber, a back pressure valve in the oil passage below the cylinder, a piston within the cylinder, such piston having a reduced end and being formed with a neck portion adjacent to the reduced end and adapted to be moved forward to cause a compression within the top chamber and supply pipe and a spring for returning the piston to cause asuction at the reservoir outlet.

In testimony whereof, I have signed my name to this specification, in, the presence of two subscribing.witnesses.

ROBERT WOOD.

Witnesses:

STANLEY C. Kim}, IIAROLD J. INNS. 

